The first round of severe thunderstorms dropped some large hail Friday morning in central Indiana, but round two threatened to be more ferocious, particularly in southern Indiana.

Damage was reported in the Wadesville area of Posey County, and storm spotters said twisters were on the ground just north of Louisville.

Reports of rotation prompted the issuance of a tornado warning in Boone and Hamilton counties Friday afternoon, but officials in those counties said there were no confirmed touchdowns, and the storm showed little rotation on Storm Team 6 radar.

Indiana was on the northern fringe of a dangerous weather situation that began unfolding across several states as a potent storm system pushed through the region.

The National Weather Service's Storm Prediction Center placed parts of southern Indiana in a high risk area for severe weather, including the Columbus area southward.

High risks are particularly rare. Just five high risk areas were issued last year in the entire U.S.

A large part of Indiana, including the Indianapolis area, was placed in a moderate risk zone for severe weather through the evening as the secondary line of thunderstorms approached.

The severe weather threat is ending from west to east with the passage of the second round of storms.

Strong winds, large hail and tornadoes, some of them strong and long-tracked, were expected in southern Indiana and south of the state.

"The chance of tornadoes and a little more significant severe weather will be across the southern half of the state throughout the afternoon hours," said Storm Team 6 meteorologist Todd Klaassen.

Up to golf ball-sized hail was reported in a line of storms that moved into Indianapolis around 11 a.m., prompting numerous storm warnings along the line. Pea-sized hail fell in downtown Indianapolis, but larger hail fell southwest and south of downtown and in some counties west of the city.

Storms are possible through early evening across the entire region, with large hail the main threat in earlier storms.

The tornado and damaging wind threat will increase as a warm front pushes through and ahead of a cold front that will swing through the region later.

This is a particularly volatile spring-like storm system, with a forecast in many ways worse than a few days ago, when severe thunderstorms and tornadoes killed 13 people.